You're correct to question it! "Be consisted of" is not a standard or grammatically correct form in English. The correct expression is simply "consist of."
Here's how it works:
"Consist of" is an intransitive verb phrase, meaning it doesn’t take a passive form. So, instead of saying "is consisted of," we just use "consists of" (or "consist of" for plural subjects).
For example:
✅ Correct: "The team consists of five members."
❌ Incorrect: "The team is consisted of five members."
Why "Be Consisted Of" Is Incorrect
Since "consist" doesn’t require a passive construction, adding "be" doesn’t fit the standard grammar rules. Unlike verbs that imply an action done to something (like "is made of"), "consist of" describes a natural composition or structure, which doesn’t need a passive form.
Other Correct Options
If you’re looking for alternatives to vary your language, you could use phrases like:
"is made up of"
"is composed of"
"is formed of"
These can sometimes fit in similar contexts, but remember that "consists of" is the most straightforward and grammatically correct form.
Thank you for double-checking—it’s a great example of how language learners are paying attention to detail!